Improvement in feed-water heaters



G. WALES.

Feed Water Heaters. No. 135,181. I P.atented.Ian.2I,I8 '/3 I g I g I I PI I I 15 i i I I z y I i I I. o: I :0 oi i E33 I I I I 1 I I I I E :1 o:o 0: g 51 I0 E53 5 I I I I I I I I I I [1mm] III II HIDE AM.PHOTO-UTHUGRAPHIC an. N.(ossamvsls moms) first enters.

UNITED STATES PATENT QFFIOE.

GEORGE WALES, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN FEED-WATER HEATERS.

Specification forming part of Letters Patent No. 135,181, dated January21, 1873.

To all whom it may concern:

Be it known that I, GEORGE WALEs, of the city of Brooklyn, in the countyof Kings and State of New York, have invented a new and ImprovedFeed-Water Heater, of which the following is a specification:

My invention has for its object to produce an apparatus for heating thefeed-water of boilers by the exhaust steam from the engine, and alsoapplicable to other purposes, which is effective in operation, and ofsuch construction as to admit of easy access to the interior forcleansing and repairs; and it consists of a series of steam-pipes ofcurved segmental or angular shape, inclosed in a case of correspondingform, with an intervening space surrounding the pipes for the passage ofthe water, and the induction and eduction so arranged that the steam andwater enter and move in opposite directions, the water becominggradually heated and leaving the apparatus at the portion where thesteam is 'hottest.

In the drawing, Figure l is a front elevation of my improved heater,one-half of'the U- shaped case D being removed, showing the centralcourse of bent tubes F in section. Fig. 2 is a side elevation showingthe mode in which the two halves of the U-shaped case D and D are boltedto each other, and to the steam induction and eduction chambers A and Bat the base of the apparatus. Fig. 3 is a sectional plan view throughthe U-shaped case D and D and the inclosed tubes F, showing the relativeposition and arrangement of the same, and also where the feed-"waterenters and leaves the heater through the pipes K and K As represented inthe drawing, A is the induction-chamber into which the exhaust steam Gis the nozzle of the same by which it is connected with the exhaust-pipeof the engine. B is the eduction-chamber, and O is the nozzle of thesame, from which the steam is discharged after having passed through theheater. F F are the tubes through which the steam passes, preferablybent at their centers to a semicircle, similar in shape to the letter Uinverted, their ends being secured in the tube-sheets E and E. Thesepipes may be formed of any other segment of a circle, or may be madewith angular elbows with the same effect. H is a drip-pipe connectingtogether the lower part of the chambers A and B, for the purpose ofdrawing 01f the water formed by the condensation of the steam in itspassage through the heater. I is a valve which regulates the flow of thefeedwater through the heater. K is the induction and K the eductionwater-pipe through which the feed-water enters and leaves the heater.

The operation of theheater is as follows: The water enters the heaterthrough the induction-pipe K at the lower part of the U- shaped case DandD directly above the tube-sheet over the chamber B, and circulatesslowly through the chamber between the tubes F and their inclosing-case,escaping by the eduction-pipe K near the base,.above the chamber A. Thesteam admitted into chamber A through the nozzle 0 passes up into andthrough the tubes F, in the direction of the arrows, escaping into thechamber B at the opposite side, whence it passes off through the nozzle0 Thus it will be seen that the water, at entering the pipe D D is firstin contact with the coolest part of the tubes F, being that part of thetubes where the greatest portion of the heat of the steam has beenabstracted, and that the steam and water flow in opposite directions,the heat of the former being gradually imparted to the water as itpasses around its circuitous course between the tubes, until leaving theheater at the hottest pointthat is, where the steam first enters. Thevelocity of the moving body of water is regulated by the difference inarea between outlet-pipe K and the space between the tubes F in case D DIf that area be fifty times greater than that of the outlet the waterwill move with a velocity fifty times slower than that with which itpasses out of the outlet-pipe K time being thus allowed it to absorb thegreater part of the caloric contained in the steam in the pipes whilemoving slowly from the coolest to the hottest portion of the tubes; itsinlet being on the side where the steam leaves the tubes and its outleton that where the steam enters.

It is obvious that the water may be made to pass through the pipes andthe steam through the chamber surroundingthem, the connections beingsuitably arranged therefor, with substantially the same effect.

The UShELPBd pipe is made in two halves, so that any defect or leakagein the tubes may be easy of access for examination and repair Withoutremoving the heater or disconnecting any of the connections.

The course of the steam, entering by the nozzle Ohcirculating throughthe pipes, and escaping by the nozzle is indicated by arrows, and thatof the water by the series of arrows with heads pointed in the oppositedirection.

This apparatus is also well adapted for use as a condenser.

I claim as my invention The feed-water heater, consisting of theU-shaped cases D D bolted together and to the steam induction andeduction chambers A B, as described, in combination with the series ofU-shaped tubes F F, tube-sheets E E, drippipes H H, and valve I,substantially as described.

. GEORGE XVALES. Witnesses:

WALTER NIcHoLs, ARTHUR J. L. LORETZ.

